import android.support.v17.leanback.database.CursorMapper; //导入依赖的package包/类
/**
 * Sets the {@link CursorMapper} used to convert {@link Cursor} rows into
 * Objects.
 */
public final void setMapper(CursorMapper mapper) {
    boolean changed = mMapper != mapper;
    mMapper = mapper;

    if (changed) {
        onMapperChanged();
    }
}
 

import android.support.v17.leanback.database.CursorMapper; //导入依赖的package包/类
/**
 * Gets the {@link CursorMapper} used to convert {@link Cursor} rows into
 * Objects.
 */
public final CursorMapper getMapper() {
    return mMapper;
}